( clxxxii ) 



Aculeates, but not rare in Sawflies, and occurring also in cer- 

 tain (^ (^ of Lepidoptera and Coleoptera, which (I am told) are 

 known to have extraordinary powers of discovering their ? $. 



In these, and indeed in all cases, the antennae of ? Aculeates 

 are practically quite simple ; or, if in the least abnormal, 

 their characters are evidently not Sexual but Generic. 



There can be little doubt that most, if not all, of these (^ 

 antennal-characters increase the efficiency of the antennae as 

 sense-organs, and enable their possessors to discover the ? ? 

 at a greater distance. The latter never seek their ,^i^, and 

 therefore neither require nor possess antennae or eyes specially 

 adapted for discovering them. 



But inasmuch as some Hymenoptera (e. g. Ants) certainly 

 use their antennae not only to receive sensations but to impart 

 them, it seems not impossible that paradoxical formations of 

 these structures might also render communications made 

 through them more persuasive to $ ? possessed of certain 

 specific sensibilities, just as some peculiarity in the larynx of 

 a $ Vertebrate might give his voice a particular quality or 

 timbre which might be agreeable to the ear of his $. (Cf. the 

 Songs of Male Birds.) 



(3) Now as to characters in the c? legs. These in the Ants 

 are not conspicuous. But in many species of all the other 

 families they are so diversified, and often so extraordinary, 

 that it is quite impossible to discuss them adequately when 

 time is limited. 



"We find that in 6 ^ oi one species or another of Bees, 

 Wasps, or Fossors, and sometimes pretty similarly in species 

 belonging to different groups, practically every joint of every 

 leg may be distorted into some eccentric but unvarying shape, 

 twisted, flattened, paradoxically lengthened or shortened, 

 armed with tooth-like tubercles, spurs, spines, etc., excavated 

 beneath, drawn out at the apex into a sort of tongue- or finger- 

 like process, etc., etc. In connection with these phenomena, 

 or apart from them, really startling pilosity-characters appear 

 in many cases, making even normal structures look quite 

 monstrous. I can only pick out a few examples at random, 

 and leave the rest to be imagined. 



Several spp, of Crahro and Bevihex (Fossors), Megachih 



